Eric Edgar Cooke was born and raised in Perth, Australia. His family despised him from birth due to his cleft lip. He became a quiet boy and awkward teen. He did things to fit in, but that often including illegal activities. He was known as a petty thief early on. 

He got married and had numerous children, while he worked, he also continued his life of crime. Something that his wife accepted. But then his small crimes escalated to rape and assault. Even continuing to escalate until he murdered multiple people.  He was caught after attempting to retrieve a rifle he'd hidden in bushes. After his arrested he was easily persuaded to confess to his crime. For which he ended up as the last man in Western Australia to be hanged. 

Sources:

Rosewood, Jack. 2015. Eric Edgar Cooke: The true story of the Night Caller

https://allthatsinteresting.com/eric-edgar-cooke

https://www.abc.net.au/news/2014-10-02/letting-go-of-the-sins-of-a-father/5785692

https://www.crimetraveller.org/2016/08/eric-edgar-cooke-night-caller/

https://www.unilad.com/news/eric-edgar-cooke-night-caller-serial-killer-australia-20220620

https://www.abc.net.au/news/2017-11-14/eric-edgar-cooke-serial-killer-voice-heard-53-years-later/9122724

https://serialkillercalendar.com/THE-NIGHT-CALLER-ERIC-EDGAR-COOKE.php